I was told that drinking carbonated beverages would stretch out my pouch and could cause my stomach to get a ulcer. Well I know that the ulcer thing is true because before I had the band I had stomach problems because of carbonated beverages and caffine, both will wreck havoc on your stomach. My doctor told me that after a fill you stomach swells a little so thats why the liquids and puree's for 2 days. Your stomach needs to heal. I have seen first hand what not following the rules has done to another bandster. A man I worked with had lost close to a 100 lbs then started drinking the soda's again and snacking between meals. He even bragged that he could eat almost anything he wanted. Well guess what, he has gained most of the weight back. I don't want to go down the path he has. I love feelin good again and I refuse to give that up. I feel a 100% better since giving up soda's and I really don't miss them at all. I wish you all the best and I hope you are successful with your weight loss.